Demerara guy should know this because he lives most of the year in Canada where there is deregulation in some cities.
As long as there is no price fixing and there is true competition (unlike Enron) between power companies then the consumers will benefit.
Indeed, there is very little or no competition in smaller areas, whether in Canada or the US_of_A.
However, due to deregulation, individuals in numerous areas, especially the larger cities, towns and other locations, individuals have the option to choose companies.
For example, in my area, a person needs to give one month's notice to his/her company and then switch to another company for the supply of electricity. Numerous years ago, companies were restricted to providing power ONLY to the local confined communities. For a long time now, a company not only provides electricity to the said local areas, but also to all areas of Canada, US_of_A, etc.. The current President and CEO of the Canadian company is a US_of_A citizen who occupied the position about three months ago.